That’s a really well built box mod. I love all of your tutorial videos. Ill most likely be buying this kit today. Thanks for the wonderful explanations and time to help us understand better.
Your build videos are second to absolutely none. What kind of soldering iron would you recommend. I had a 15 watt but it broke. The thing took forever to heat up
Thanks man :). I'd recommend a soldering station more than a standalone iron, one with temp control is nice. Hopefully this will help, wiki.ezvid.com/best-soldering-stations .
I'm looking to build a mod much like this but using a 3s or 4s lipo am I wrong in assuming that the wiring would be much the same minus the battery sled portion. Also would you mind doing a video on that and suggesting a kit or parts from me from your site
If the PWM board supports 3/4s then yeah the wiring would be the same. It might be a while before I make a PWM lipo vid but the iPWM kit we sell has a lipo option.
I don't have the SmartPWM boars any more, but I do have the Big Al's iPWM boars instead. I don't think I ever listed that 3D printed top cover but I can add it if you want...
The board itself can handle ~40A (I think), you'll probably be limited by the batteries before the board and it also depends on how many batteries (in series) you use because, for the same output power(Watts), as you increase the voltage, you decrease the amp draw. Another thing to keep in mind with PWM is that it regulates the output voltage by rapidly switching on and off, the "width" in "pulse width modulation" is the length of time it's on, but for the time it is on, it's always on full, so assuming your batteries are rated for 30A, 2 cells/batteries (series): (3.7 * 2) = 7.4V 7.4V / 30A = ~0.25 Ohm Output = 222W 3 cells/batteries (series): (3.7 *3) = 11.1V 11.1V / 30A = 0.37 Ohm Output = 333W If you put pairs of parallel batteries in series you double the amp handling of each pair (60A) but then you'd run into the 40A limit of the board, 4 cells/batteries (2p2s): 7.4V 7.4V / 40A = ~0.16 Ohm Output: 296W All that being said, I wouldn't recommend pushing things to their absolute limits, with any series mod (noisy cricket, etc) people tend to build their coils at a higher resistance because with the higher voltage you don't need to build super low to to get big output (Watts).
If you follow along with the vid and study the wiring diagram you should be all set :). If you are worried, the easiest and cheapest type of mod for a first build would be an unregulated/mosfet build.
I am currently out of the Smart PWM v2.2's (so is the manufacturer), I'm waiting on the new v3's which should be out in a few weeks. I don't think the website will let you complete the checkout if the item(s) are out of stock.
